Hard connecting rod device for locking positive and negative air door linked switch for coal mine

The synchronous linkage and interlocking of the forward and reverse ventilation doors is achieved by using a rigid linkage device, which solves the problems of loose interlocking of traditional coal mine ventilation doors and easy breakage of wire ropes, improves the stability and safety of the mine ventilation system, and reduces maintenance costs.

CN223908247UActive Publication Date: 2026-02-13NINGXIA WANGWA COAL IND CO LTD
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Patent Information

Application Number
CN202520680625.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-11
Publication Date
2026-02-13
Estimated Expiration
2035-04-11

AI Technical Summary

Technical Problem

Traditional interlocking devices for forward and reverse ventilation doors in coal mines suffer from problems such as doors being open for extended periods, redundant wire rope length leading to insecure locking, and wire ropes being prone to breakage, all of which affect the stability and safety of the ventilation system.

Method used

A rigid linkage device is adopted, which realizes synchronous linkage and interlocking of the forward and reverse dampers through a pneumatic cylinder and a connecting rod. A check valve is used to ensure that the other damper automatically locks when one damper is opened. The steel wire rope connection is eliminated and a rigid connection is used instead of the steel wire rope.

Benefits of technology

This system enables synchronous linkage between forward and reverse ventilation doors, improving the stability and reliability of the mine ventilation system, reducing the construction and maintenance costs of ventilation doors, and avoiding the risk of wire rope breakage.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a hard connecting rod device for locking a positive and negative air door linkage switch for a coal mine, which relates to the technical field of coal mine operation and comprises positioning pieces and a supporting piece, the positioning pieces are mounted at two ends of the outer side of a door body, the door body is arranged on the inner side of an air wall, and the door body is provided with a front air door and a rear air door which are respectively a front air door and a rear air door. The supporting pieces are arranged at the two ends of the outer sides of the positive air door and the reverse air door respectively. The positioning pieces and the supporting pieces are additionally arranged on the door leaves of the positive ventilation door and the negative ventilation door, one end of the connecting rod is connected with the pneumatic cylinders, the other end of the connecting rod is connected with the positioning pieces, opening and closing of the door bodies are achieved, and the check valves are arranged in the air cylinder switch control boxes connected with the pneumatic cylinders of the positive ventilation door and the negative ventilation door. In other words, in the opening or closing process of one air door, the other air cylinder switch control box is automatically locked and cannot act, the linkage locking function of the positive air door and the negative air door is achieved, and the problem that the two air doors can be opened at the same time is solved.
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Description

TECHNICAL FIELD

[0001] The utility model relates to coal mine operation technical field especially relates to a coal mine is with positive and negative air door interlocking switch lock's hard link rod device. BACKGROUND

[0002] According to the coal mine safety regulation: between the air inlet and the air return well and between the main air inlet and the air return lane, every contact lane must be built permanent air wall; the contact lane that needs to use must be equipped with two interlocking positive air doors and two negative air doors;

[0003] The traditional positive and negative air door used in the coal mine adopts pneumatic switch device (hereinafter referred to as cylinder) to control the opening and closing of two positive air doors, and steel wire rope is used to connect and lock the two positive air doors, and the two negative air doors are in a long-term open state, and in the long-term operation process, this kind of mode has the following disadvantages:

[0004] The two negative air doors are in a long-term open state, and no interlocking device is set, which does not meet the interlocking requirement of negative air door;

[0005] The two positive air doors are locked by steel wire rope, which is laid and connected on the front and rear two positive air doors through fixed path, and the redundant length needs to reach the stroke of one air door, so that the two positive air doors can be opened by 50% of the stroke at the same time, the locking function is not rigorous, and there is the risk of disorder of ventilation system;

[0006] The use of cylinder and steel wire rope to control the opening and closing of air door is prone to the situation that the steel wire rope is broken, causing poor stability of ventilation facility operation;

[0007] Therefore, the utility model provides a coal mine is with positive and negative air door interlocking switch lock's hard link rod device to solve the problems in the prior art. INVENTION CONTENTS

[0008] In view of the above problems, the utility model provides a coal mine is with positive and negative air door interlocking switch lock's hard link rod device, which can realize synchronous opening and closing interlocking of positive and negative air doors, eliminate the security risk of air door interlocking not being rigorous, improve the stability and reliability of mine ventilation system operation, cancel the use of steel wire rope, and reduce the cost of air door construction and later maintenance.

[0009] To achieve the purpose of the utility model, the utility model realizes the following technical scheme: a coal mine is with positive and negative air door interlocking switch lock's hard link rod device, including positioning piece and support piece, the positioning piece is installed at both ends of the door body outside, the door body is arranged at the inside of air wall, and the door body is provided with two groups of positive air door and negative air door respectively, the support piece is arranged at both ends of the positive air door and the negative air door outside position respectively;

[0010] The support comprises a bracket and a pneumatic cylinder, the pneumatic cylinder is arranged on the bracket, and the output end of the pneumatic cylinder is rotationally provided with a connecting rod, one end of the connecting rod is movably connected with the positioning member at the same end position, the pneumatic cylinders at the positive air door and the reverse air door are respectively connected with a pneumatic cylinder switch control box through pipelines, and the two groups of pneumatic cylinder switch control boxes are linked and locked.

[0011] Further improvement lies in that: the two groups of pneumatic cylinder switch control boxes are internally provided with check valves, and the air inlet ends of the two groups of pneumatic cylinder switch control boxes are respectively connected with two groups of branch air supply paths of the same main air path.

[0012] Further improvement lies in that: when one group of pneumatic cylinder switch control boxes is in air supply operation, the other group of pneumatic cylinder switch control boxes is automatically locked and cannot be actuated.

[0013] Further improvement lies in that: the output end of the pneumatic cylinder is connected with a support, and a rotating roller is rotationally arranged on the support, and one end of the connecting rod is connected with the rotating roller.

[0014] Further improvement lies in that: the positioning member comprises a connecting plate and a supporting plate, the connecting plate is fixed on the door body, the supporting plate is arranged on the outer side of the connecting plate, the inner side of the supporting plate is provided with a sliding groove, a sliding roller is movably arranged on the sliding groove, and the outer side of the sliding roller is rotationally provided with a rotating cylinder, and the end of the connecting rod, away from the rotating roller, is connected with the rotating cylinder.

[0015] Further improvement lies in that: both ends of the connecting plate are provided with fixing bolts, and the connecting plate is fixed with the door body through the fixing bolts.

[0016] The utility model discloses the beneficial effect is:

[0017] 1, the utility model discloses a positioning member and support are installed on every door leaf of positive, reverse air door, one end of connecting rod is connected with pneumatic cylinder, the other end is connected with positioning member, realizes the switch of door body, and the pneumatic cylinder switch control box inside that pneumatic cylinder connects of positive, reverse air door is provided with check valve, when one pneumatic cylinder switch control box is in air supply operation, namely in the process that one air door opens or closes, the other pneumatic cylinder switch control box is automatically locked, cannot act, realizes the linkage locking function of positive, reverse air door, eliminates the problem that two air doors can open simultaneously.

[0018] 2, the utility model discloses the hard connection of connecting rod is used instead of steel wire rope, has reduced the cost of air door construction and later maintenance, realized the linkage switch of positive, reverse air door, and hard connection operation is stable, can not appear the situation of being pulled apart, has greatly promoted the stability, reliability of positive, reverse air door operation, the rigor of linkage locking function. DRAWINGS

[0019] Figure 1 It is the front view of the utility model.

[0020] Figure 2 It is the positive and reverse air door schematic view of the utility model;

[0021] Figure 3 It is the positioning member schematic view of the utility model.

[0022] Among them: 1, door body; 2, support; 3, pneumatic cylinder; 4, connecting rod; 5, cylinder switch control box; 6, support; 7, rotating roller; 8, connecting plate; 9, support plate; 10, rotating drum; 11, sliding slot; 12, fixing bolt; 13, air wall; 14, sliding roller. DETAILED DESCRIPTION

[0023] In order to deepen the understanding of the utility model, the utility model will be further described in the following combined with examples, and the present embodiment is only used to explain the utility model, and does not constitute the limitation of the protection scope of the utility model.

[0024] Example One

[0025] According to Figure 1 、 2 , 3 shows, the present embodiment proposes a kind of hard link rod device for locking of positive and reverse air door linkage switch for coal mine, including positioning member and support piece, the positioning member is installed at the both ends of door body 1 outer side, the door body 1 is located in air wall 13 inner side, and door body 1 is equipped with two groups of positive and reverse air door respectively before and after, the support piece is respectively arranged at the both ends of position outside positive and reverse air door;

[0026] The support piece includes support 2 and pneumatic cylinder 3, the pneumatic cylinder 3 is arranged on support 2, and the output end of pneumatic cylinder 3 is rotationally provided with connecting rod 4, one end of connecting rod 4 is movably connected with the positioning member at same end position, the pneumatic cylinder 3 at positive and reverse air door is respectively connected with cylinder switch control box 5 by pipeline, and two groups of cylinder switch control box 5 are linked and locked. When using, positioning member and support piece are added on each door leaf of positive and reverse air door, one end of connecting rod 4 is connected with pneumatic cylinder 3, and the other end is connected with positioning member, to realize the opening and closing of door body 1, the cylinder switch control box 5 connected with pneumatic cylinder 3 of positive and reverse air door is all equipped with check valve, when one cylinder switch control box 5 is operated, namely during the opening or closing process of one air door, the other cylinder switch control box 5 is automatically locked, cannot act, realizes the linkage locking function of positive and reverse air door, eliminates the problem that two air doors can be opened simultaneously.

[0027] Two groups of the air cylinder switch control box 5 are internally provided with check valves, and the air inlet ends of the two groups of the air cylinder switch control box 5 are respectively connected to two groups of branch air supply paths of the same main air path. When one group of the air cylinder switch control box 5 is in air supply operation, the other group of the air cylinder switch control box 5 is automatically locked and cannot act. Main air source: compressed air (or gas) is provided and delivered to the system through a main pipeline. Branch air paths A and B: the main air source is branched into two independent branches and is respectively connected to the air cylinder switch control box A and the air cylinder switch control box B. Check valve: a check valve is installed in each branch air path, which only allows air flow from the main air source to the air cylinder switch control box (air cylinder switch control box A→air cylinder A, air cylinder switch control box B→air cylinder B) and prohibits reverse flow. Air cylinder switch control box A: receives a magnetic switch / sensor signal (monitors the piston position of the air cylinder A). The state of the air door (opening / closing / complete) is determined by the control circuit. A locking signal (electrical signal or pneumatic signal) is sent to the air cylinder switch control box B. Air cylinder switch control box B: the structure is symmetrical to the air cylinder switch control box A and has the same function. When receiving the locking signal of the air cylinder switch control box A, the electromagnetic valve is forced to be closed, and the air cylinder B is prohibited from acting.

[0028] Embodiment two

[0029] According to Figure 1 、 2 , 3, the embodiment provides a hard link rod device for locking the linkage of positive and reverse air doors, which comprises a positioning member and a supporting member, the positioning member is installed at both ends of the outer side of a door body 1, the door body 1 is arranged on the inner side of an air wall 13, and the door body 1 is provided with two groups of positive and reverse air doors, respectively, the supporting member is arranged at both ends of the outer side of the positive and reverse air doors,

[0030] The supporting member comprises a bracket 2 and an air cylinder 3, the air cylinder 3 is arranged on the bracket 2, and the output end of the air cylinder 3 is rotationally provided with a connecting rod 4, one end of the connecting rod 4 is movably connected with the positioning member at the same position, and the air cylinders 3 at the positive and reverse air doors are respectively connected to an air cylinder switch control box 5 through a pipeline, and the two groups of the air cylinder switch control box 5 are linked and locked. In use, the positioning member and the supporting member are added to each door leaf of the positive and reverse air doors, one end of the connecting rod 4 is connected with the air cylinder 3, and the other end is connected with the positioning member, so as to realize the opening and closing of the door body 1, the air cylinder switch control box 5 connected with the air cylinders 3 of the positive and reverse air doors is internally provided with a check valve, when one air cylinder switch control box 5 is in air supply operation, that is, during the opening or closing process of one air door, the other air cylinder switch control box 5 is automatically locked and cannot act, thereby realizing the linkage locking function of the positive and reverse air doors and eliminating the problem that the two air doors can be opened at the same time.

[0031] The output end of the air cylinder 3 is connected with a support 6, and the support 6 is rotatably provided with a rotating roller 7, and one end of the connecting rod 4 is connected with the rotating roller 7. The positioning member comprises a connecting plate 8 and a supporting plate 9, the connecting plate 8 is fixed on the door body 1, the supporting plate 9 is arranged on the outer side of the connecting plate 8, the inner side of the supporting plate 9 is provided with a sliding groove 11, and the sliding groove 11 is movably provided with a sliding roller 14, and the outer side of the sliding roller 14 is rotatably provided with a rotating cylinder 10, and the end of the connecting rod 4 away from the rotating roller 7 is connected with the rotating cylinder 10. Both ends of the connecting plate 8 are provided with fixing bolts 12, and the connecting plate 8 is fixed with the door body 1 through the fixing bolts 12. In use, the air cylinder 3 drives the support 6 to move, and the support 6 drives the connecting rod 4 to displace through the rotating drive of the rotating roller 7, the connecting rod 4 pulls the rotating cylinder 10, and the rotating cylinder 10 and the sliding roller 14 are used to drive the door body 1 to open or close through the rotation of the rotating cylinder 10 and the sliding of the sliding roller 14.

[0032] The hard connecting rod device for locking the opening and closing of the forward and reverse air doors of the coal mine is provided with a positioning member and a supporting member on each door leaf of the forward and reverse air doors, one end of the connecting rod 4 is connected with the air cylinder 3, and the other end is connected with the positioning member, so as to realize the opening and closing of the door body 1. The air cylinder switch control boxes 5 connected with the air cylinders 3 of the forward and reverse air doors are each provided with a check valve. When one air cylinder switch control box 5 is in operation, that is, when one air door is in the process of opening or closing, the other air cylinder switch control box 5 is automatically locked and cannot be operated, so that the linkage locking function of the forward and reverse air doors is realized, and the problem that the two air doors can be opened at the same time is solved. The hard connection of the connecting rod 4 is used instead of the steel wire rope, the cost of the construction and the later maintenance of the air door is reduced, the linkage opening and closing of the forward and reverse air doors is realized, the hard connection is stable in operation, and the hard connection will not be pulled off, so that the stability, reliability and linkage locking function of the operation of the forward and reverse air doors are greatly improved.

[0033] The basic principle, main features and advantages of the utility model are shown and described. It should be understood by the person skilled in the art that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model can have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A hard link device for locking the linkage of a forward and reverse air door in a coal mine, comprising a positioning member and a supporting member, characterized in that: The positioning member is installed at both ends of the outer side of the door body (1), the door body (1) is arranged at the inner side of the air wall (13), and the door body (1) is provided with two groups of forward air doors and reverse air doors respectively; the supporting member is arranged at both ends of the outer side of the forward air door and the reverse air door respectively; The supporting member comprises a support (2) and a pneumatic cylinder (3), the pneumatic cylinder (3) is arranged on the support (2), and the output end of the pneumatic cylinder (3) is rotatably provided with a connecting rod (4), one end of the connecting rod (4) is movably connected with the positioning member at the same position, the pneumatic cylinders (3) at the forward air door and the reverse air door are respectively connected with a pneumatic cylinder switch control box (5) through a pipeline, and the two groups of pneumatic cylinder switch control boxes (5) are linked and locked.

2. The hard link rod device for locking the on-off valve of the positive and reverse air door used in the coal mine according to claim 1, characterized in that: Two groups of the pneumatic cylinder switch control boxes (5) are provided with check valves inside, and the air inlet ends of the two groups of pneumatic cylinder switch control boxes (5) are respectively connected with two groups of branch gas supply roads of the same main gas road.

3. The hard link rod device of the positive and reverse air door linkage switch lock for coal mine according to claim 2, characterized in that: When one group of the pneumatic cylinder switch control boxes (5) is in air supply operation, the other group of the pneumatic cylinder switch control boxes (5) is automatically locked and cannot act.

4. The linkage device of claim 1, wherein: The output end of the pneumatic cylinder (3) is connected with a support (6), and a rotating roller (7) is rotatably arranged on the support (6), and one end of the connecting rod (4) is connected with the rotating roller (7).

5. A hard link device for locking the on-off switch of a forward and reverse air door linkage for coal mine according to claim 4, characterized in that: The positioning member comprises a connecting plate (8) and a supporting plate (9), the connecting plate (8) is fixed on the door body (1), the supporting plate (9) is arranged on the outer side of the connecting plate (8), the inner side of the supporting plate (9) is provided with a sliding groove (11), and a sliding roller (14) is movably arranged on the sliding groove (11), the outer side of the sliding roller (14) is rotatably provided with a rotating drum (10), and one end of the connecting rod (4) away from the rotating roller (7) is connected with the rotating drum (10).

6. A hard link device for locking the on-off switch of a forward and reverse air door linkage for coal mine according to claim 5, characterized in that: Both ends of the connecting plate (8) are provided with fixing bolts (12), and the connecting plate (8) is fixed with the door body (1) through the fixing bolts (12).